What's wrong is that this is Vergil we're on about. He used Dante to do all the work for him, killing the succubus, Bob...so that Vergil could stay hidden in the shadows. Then as soon as Dante disagrees with Vergil, he casts him aside and wants to fight him. I don't think he wanted to find Dante out of brotherly love, but because as a Nephilim, Dante was the only other worthy being to rule humanity with. [Without Vergil dispatching Kat to assist Dante, he is probably dead in the first fight with hunter.]
Yes, Vergil says that, but Vergil could be lying. He's, to put it mildly, not a nice guy. Yes it could be the demonic infulence, but how do we know what is truly going on in his head? Vergil's downfall shows that it is a very messed up place. [don't blame on him, he lost too much humanity in the comic because of using DT to save Kat]
He told Kat to escape because what use would she be to him if she was dead? He still needed her for the missions shown in the game. [at that time he was facing onyx, a demon he knows he is not capable to defeat. he was risking his life in order to protect Kat.]
Even so, she had nowhere to go. Vergil actually says when he recruits her 'But I do still need you. You're a psychic, Kat. Your powers...They'd be very useful to me-- And my cause.' He was using her from the beginning. That's what he says to her. [at the end, it is obviously he did not want to risk her life anymore. but this time, it is Kat who begged to stay with him.]
And she refuses him. On top of that, Vergil was already warped in the comic. His demon side had already got some infleunce over him. He introduces himself as the son of a demon, so who's to say he wasn't letting his demon side influence his actions then? [he introduced himself as a son of a demon and an angel. did you read the comic????]
The he puts Kat in a position where she has to join him, he says 'In the end it doesn't matter what you think. In a few seconds, the demons will catch me on cameras and decide you really are my accomplice'. He forces her hand into joining him. He needs to use her and forces her to join. Then he puts her in another situation where she has no choice but to be taken to Hellfire prison because of his actions. [She will be dragged into limbo whenever, it does not depend on Vergil's intention]
As for loving Kat, he says in reference to Sparda 'love got the better of him' and that he is the son of 'a traitor and a whore'. I'd say that does indicate that Vergil doesn't have much humanity even then. It seems like everything in that comic is Vergil manipulating Kat. [sorry, i don't agree at all]
Just because he acts like he needs no one doesn't mean that he's not tricking Kat. He's tricked her before, so how is the kiss and his sudden confession any different? He's a liar and a manipulator. [trick when? he didn't trick Kat at all.He was straightforward right from the very beginning. When Kat's brain was occupied by demons, Vergil was truly ****ed off and was forced to use DT to protect her.]
I'd say he already was more demonic than he let on by the end.